Sherlock on Masterpiece

"The Lying Detective" is the second of the stories in this fourth season of the series, based on the Sir Arthur Conan Doyle short story "The Adventure of the Dying Detective." Sherlock (Benedict Cumberbatch) devises a ruse about his own health to get Culverton Smith (guest star Toby Jones) to admit to committing a crime within his own family. Martin Freeman (as Dr. Watson, of course) also stars.